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Impact-resistant lightweight density gradient composite material, fan containment casing, preparation method and application thereof

A technology of density gradient and composite materials, applied in chemical instruments and methods, transportation and packaging, synthetic resin layered products, etc., can solve the problems of high manufacturing cost, late start of research, thick casing structure, etc., and achieve improved impact resistance performance, reduced structural weight, and high-speed impact resistance

Active Publication Date: 2019-01-29
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, GE's CF6-80C2 engine and GE90 engine all use aramid-coated metal composite fan containing casing, that is, wrap a circle of aluminum honeycomb layer on the aluminum casing, and then wrap it with 65 layers of aramid cloth A thick rim is formed, and a layer of resin is coated outside the aramid rim to protect the aramid cloth layer; GE's GEnx engine uses a composite fan containment case, which first uses two-dimensional three-dimensional Shaft braiding technology is used to manufacture braided preforms, and then integrally formed by RTM technology. In order to accommodate the fan blades, the casing structure is thick and the manufacturing cost is much higher than that of metal casings.
[0005] Domestic research on the containment structure of the engine fan case started late, and the composite material containment case is still in the research and exploration stage

Method used

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  • Impact-resistant lightweight density gradient composite material, fan containment casing, preparation method and application thereof

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preparation example Construction

[0047] The preparation method of the lightweight impact-resistant density gradient composite material of the present invention specifically comprises the following steps:

[0048] (1) Lay or wrap carbon fiber fabric prepreg, carbon fiber and aramid hybrid fiber fabric prepreg and aramid fiber fabric prepreg on the forming mold in sequence, and perform pre-compacting by absorbing glue, wherein the glue-absorbing prepreg The compaction temperature is 50°C-80°C, the holding time is 0.5h-2.5h, and the pressure is 0.2MPa-0.5MPa; two pre-compaction processes are set up, one after the carbon fiber fabric prepreg layer is completed, and After the carbon fiber and aramid hybrid fiber fabric prepreg layup is completed, the adhesive pre-compaction is carried out in the form of vacuum bag / autoclave. When absorbing adhesive, the vacuum gauge pressure is not greater than -0.097MPa, and the heating rate is 20°C-120 ℃ / h, pressurize to 0.2-0.3MPa when the temperature rises to 60-80℃, and then ...

Embodiment 1

[0070] The reinforcing fibers of composite materials containing the case are carbon fiber fabrics, carbon fiber / aramid blended fabrics, and aramid fiber fabrics, and the resin is epoxy resin cured at a medium temperature of 130°C.

[0071] The volume ratio of the carbon fiber / aramid blended fabric is mixed according to the ratio of 1:1, and the density of the mixed knitted fabric composite material is 1.45g / cm 3 .

[0072] Use cutting equipment to cut the three kinds of fabric prepregs according to a certain width, and through the winding machine, under a certain tension, according to the design layer angle and thickness requirements, different fabric prepregs are wound layer by layer to the forming positive. On the mold, wherein, the thickness of the carbon fiber fabric layer is 14mm, the thickness of the carbon fiber / aramid fiber mixed fabric layer is 2mm, and the thickness of the aramid fiber fabric layer is 10mm. After winding to the required thickness, cover the insulati...

Embodiment 2

[0075] The reinforcing fibers of composite materials containing the case are carbon fiber fabrics, carbon fiber / aramid blended fabrics, and aramid fiber fabrics, and the resin is epoxy resin cured at a medium temperature of 130°C.

[0076] The volume ratio of the carbon fiber / aramid blended fabric is mixed according to the ratio of 1:2, and the density of the mixed knitted fabric composite material is 1.40g / cm 3 .

[0077] Use cutting equipment to cut the three kinds of fabric prepregs according to a certain width, and through the winding machine, under a certain tension, according to the design layer angle and thickness requirements, different fabric prepregs are wound layer by layer to the forming positive. On the mold, wherein, the thickness of the carbon fiber fabric layer is 18mm, the thickness of the carbon fiber / aramid fiber mixed fabric layer is 6mm, and the thickness of the aramid fiber fabric layer is 12mm. After winding to the required thickness, cover the isolatio...

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Abstract

The present invention relate to an impact-resistant lightweight density gradient composite material, a fan containment casing, a preparation method and an application thereof. The impact-resistant lightweight density gradient composite material, the structure form of the composite material fan containment casing, and material delamination are creatively designed, the designs of composite structurelayers of a carbon fiber reinforced resin matrix composite layer, a carbon fiber / aramid fiber reinforced resin matrix composite layer and an aramid fiber reinforced resin matrix composite layer are adopted, the thickness of each structural layer is optimized, and the carbon fiber reinforced resin matrix composite layer resists shear failure, the carbon fiber / aramid fiber reinforced resin matrix composite layer resists delamination failure, the aramid fiber reinforced resin matrix composite layer resists tensile fracture failure. The structural design significantly reduces the structural weight and improves the impact resistance of materials.

Description

technical field [0001] The invention relates to a light-weight anti-impact density gradient composite material, a fan containment casing and a preparation method and application thereof, and belongs to the technical field of structure / function integrated composite material and its forming process. Background technique [0002] With the development of aeroengine aerodynamic design technology, structural design technology and composite material technology, the application of composite materials in high bypass ratio turbofan engines has attracted more and more attention from major engine manufacturers and research institutions in the world. The application of material components can further improve the thrust-to-weight ratio and fuel efficiency of the aircraft, and greatly improve the life and safety and reliability of the engine, while reducing noise and harmful gas emissions, increasing comfort, economy and environmental applicability, and meeting airworthiness requirements ....

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B27/06B32B27/34B29C70/34
CPCB29C70/34B32B5/02B32B5/26B32B2262/0261B32B2262/106B32B2307/558B32B2605/18
Inventor 易凯孙文文杨智勇孙建波唐占文何析峻程雷耿东兵
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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